public static byte[] DexDecrypt(byte[] plain, string Key)
{
byte[] key = System.Text.Encoding.ASCII.GetBytes(Key);
for (int round = 4; round >= 0; round--)
{
for (int i = 0; i < plain.Length; i++)
{
for (int k = 0; k < key.Length; k++) plain[i] = (byte)(plain[i] ^ ((((key[k] << round) ^ k) + i)));
plain[i] = (byte)(plain[i] ^ key[i % key.Length]);
}
}
return plain;
}